Radio astronomy

Details Radio astronomy Radio astronomy

Oct 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981tdapr..65....1s&link_type=abstract

In its The Telecommun. and Data Acquisition Rept. p 1-3 (SEE N82-11279 02-31)

Astronomy and Astrophysics

Astronomy

Deep Space Network, Interstellar Masers, Radio Astronomy, Radio Sources (Astronomy), Ammonia, Interstellar Radiation, Radio Spectra, Southern Sky, Water Vapor

Scientific paper

A K-band reflected-wave ruby maser was used on the 64-meter (DSS-43) antenna at the Tidbinbilla Tracking Station, near Canberra, Australia. Spectral line observations were carried out near 22 GHz for water vapor sources and near 24 GHz for ammonia sources. The water vapor observations were made in the direction of known southern OH and H2O maser sources. All of the previously detected water line sources examined were detected. In addition, two new water vapor maser sources were discovered, G301.1+1.1and G308.9+0.1. The spectrum of G301.0+1.1 is presented six ammonia sources were found: G291.3-0.7, G305.4+0.2, G322.2+0.6, G327.3-0.5, G333.6-0.2, and G268.4-0.8. Spectra of two of these sources, G291.3-0.7 (RCW 57) and G305.4+0.2, are presented. Both show clearly the presence of the quadrupole splitting satellite lines that will allow the determination of NH3 optical depths in these clouds.

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